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Finding the Fourth Proportional to 874,940.40, 1,312,410.60 and 476,809.20

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Solution

The fourth proportional to 874,940.40, 1,312,410.60 and 476,809.20 is: 715,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,940.40 : 1,312,410.60 = 476,809.20 : x
  2. Step 2: Convert to fraction form
    874,940.40/1,312,410.60 = 476,809.20/x
  3. Step 3: Cross multiply
    874,940.40x = 1,312,410.60 × 476,809.20
  4. Step 4: Simplify right side
    874,940.40x = 625,769,448,257.52
  5. Step 5: Solve for x
    x = 625,769,448,257.52/874,940.40
  6. Step 6: Final answer
    x = 715,213.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.